He was twirling his brass knuckles.
His stainless-steel brass knuckles sparkled in the sun.
If you were a kid living in the Wazir Akbar Khan section of Kabul, you knew about Assef and his famous stainless-steel brass knuckles, hopefully not through personal experience.
"I wonder," said he to himself, "that they have no knocker on the door, -- one knocks one's knuckles sore.
With her strong fingers she pressed them into the sand and tamped around them with her knuckles.
My own accidental cut across the knuckles was a flea-bite.
I snatched a cutlass from the pile, and someone, at the same time snatching another, gave me a cut across the knuckles which I hardly felt.
The chimps were measured both while walking upright and while moving on their legs and knuckles.
"I wonder," said he to himself, "that they have no knocker on the door, -- one knocks one's knuckles sore.
That was the boy's favourite piece of furniture, but he dared not touch it, for if he meddled with it he got a rap on the knuckles.
The chandelier gave little leaps, the crowd got their knuckles rapped, and I, the Moon, was present at the performance from beginning to end.